Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
A hybrid quantum-classical algorithm for Bayes-optimal quantum state discrimination using the source code
Ankith Mohan, Jamie Sikora, Sarvagya Upadhyay·Dec 7, 2023
Quantum state discrimination is a fundamental primitive in quantum information processing, underpinning tasks in quantum communication, sensing, and learning. We consider the general Bayes framework, as introduced by Helstrom, for state discriminatio...
Flying Spin Qubits in Quantum Dot Arrays Driven by Spin-Orbit Interaction
D. Fern'andez-Fern'andez, Y. Ban, G. Platero·Dec 7, 2023
Quantum information transfer is fundamental for scalable quantum computing in any potential platform and architecture. Hole spin qubits, owing to their intrinsic spin-orbit interaction (SOI), promise fast quantum operations which are fundamental for ...
Comparative study on compact quantum circuits of hybrid quantum-classical algorithms for quantum impurity models
Rihito Sakurai, Oliver J. Backhouse, George H Booth +2 more·Dec 7, 2023
Predicting the properties of strongly correlated materials is a significant challenge in condensed matter theory. The widely used dynamical mean-field theory faces difficulty in solving quantum impurity models numerically. Hybrid quantum--classical a...
Integration of graphene-based superconducting quantum circuits in a three-dimensional cavity
K. Chiu, Youyi Chang, Avishma J. Lasrado +8 more·Dec 7, 2023
Integrating 2D materials into circuit quantum electrodynamics (c-QED) devices is an emerging filed in recent years. This integration not only facilitates the exploration of potential applications in quantum information processing but also enables the...
Contextual subspace variational quantum eigensolver calculation of the dissociation curve of molecular nitrogen on a superconducting quantum computer
Tim Weaving, Alexis Ralli, Peter J. Love +2 more·Dec 7, 2023
We present an experimental demonstration of the Contextual Subspace Variational Quantum Eigensolver on superconducting hardware. Calculating the potential energy curve of molecular nitrogen proves challenging for many conventional quantum chemistry t...
Quantum algorithm for linear non-unitary dynamics with near-optimal dependence on all parameters
Dong An, Andrew M. Childs, Lin Lin·Dec 6, 2023
We introduce a family of identities that express general linear non-unitary evolution operators as a linear combination of unitary evolution operators, each solving a Hamiltonian simulation problem. This formulation can exponentially enhance the accu...
Scalable narrow linewidth high power laser for barium ion optical qubits.
Morteza Ahmadi, T. Dutta, M. Mukherjee·Dec 6, 2023
The linewidth of a laser plays a pivotal role in ensuring the high fidelity of ion trap quantum processors and optical clocks. As quantum computing endeavors scale up in qubit number, the demand for higher laser power with ultra-narrow linewidth beco...
Logical quantum processor based on reconfigurable atom arrays
D. Bluvstein, S. Evered, A. Geim +19 more·Dec 6, 2023
Suppressing errors is the central challenge for useful quantum computing1, requiring quantum error correction (QEC)2–6 for large-scale processing. However, the overhead in the realization of error-corrected ‘logical’ qubits, in which information is e...
Towards Quantum Computational Mechanics
Burigede Liu, Michael Ortiz, F. Cirak·Dec 6, 2023
The advent of quantum computers, operating on entirely different physical principles and abstractions from those of classical digital computers, sets forth a new computing paradigm that can potentially result in game-changing efficiencies and computa...
Slack-variable approach for variational quantum semidefinite programming
Jingxuan Chen, Hanna Westerheim, Zoe Holmes +6 more·Dec 6, 2023
Solving optimization problems is a key task for which quantum computers could possibly provide a speedup over the best known classical algorithms. Particular classes of optimization problems including semi-definite programming (SDP) and linear progra...
Clustering by Contour Coreset and Variational Quantum Eigensolver
Canaan Yung, Muhammad Usman·Dec 6, 2023
Recent work has proposed solving the k‐means clustering problem on quantum computers via the Quantum Approximate Optimization Algorithm (QAOA) and coreset techniques. Although the current method demonstrates the possibility of quantum k‐means cluster...
Coherent pair injection as a route towards the enhancement of supersolid order in many-body bosonic models
Emmanouil Grigoriou, Zhiyao Ning, Hang Su +4 more·Dec 6, 2023
Over the past couple of decades, quantum simulators have been probing quantum many-body physics with unprecedented levels of control. So far, the main focus has been on the access to novel observables and dynamical conditions related to condensed-mat...
Dual-VQE: A quantum algorithm to lower bound the ground-state energy
Hanna Westerheim, Jingxuan Chen, Zoë Holmes +6 more·Dec 5, 2023
The variational quantum eigensolver (VQE) is a hybrid quantum-classical variational algorithm that produces an upper-bound estimate of the ground-state energy of a Hamiltonian. As quantum computers become more powerful and go beyond the reach of clas...
Universality in driven open quantum matter
Lukas M. Sieberer, Michael Buchhold, Jamir Marino +1 more·Dec 5, 2023
Universality is a powerful concept, which enables making qualitative and quantitative predictions in systems with extensively many degrees of freedom. It finds realizations in almost all branches of physics, including in the realm of nonequilibrium s...
Lower-bounding entanglement with nonlocality in a general Bell's scenario
Liang-Liang Sun, Xiang Zhou, Zhen-Peng Xu +1 more·Dec 5, 2023
Understanding the quantitative relation between entanglement and Bell nonlocality is a long-standing open problem of fundamental and practical interest. Here, we tackle this problem in a general Bell scenario. {We observe that lying in the center of ...
Qubit-environment entanglement in time-dependent pure dephasing
Malgorzata Strzalka, Radim Filip, K. Roszak·Dec 5, 2023
We show that the methods for quantification of system-environment entanglement that were recently developed for interactions that lead to pure decoherence of the system can be straightforwardly generalized to time-dependent Hamiltonians of the same t...
Evaluating the Convergence Limit of Quantum Neural Tangent Kernel
Trong Duong·Dec 5, 2023
Quantum variational algorithms have been one of major applications of quantum computing with current quantum devices. There are recent attempts to establish the foundation for these algorithms. A possible approach is to characterize the training dyna...
Efficient quantum circuits for port-based teleportation
Dmitry Grinko, Adam Burchardt, M. Ozols·Dec 5, 2023
Port-based teleportation (PBT) is a variant of quantum teleportation that, unlike the canonical protocol by Bennett et al., does not require a correction operation on the teleported state. Since its introduction by Ishizaka and Hiroshima in 2008, no ...
Recovery of damaged information via scrambling in indefinite causal order
Tian-Ren Jin, Tian-Ming Li, Zheng-an Wang +3 more·Dec 5, 2023
Scrambling prevents the access to local information with local operators and therefore can be used to protect quantum information from damage caused by local perturbations. Even though partial quantum information can be recovered if the type of the d...
Towards Optimizations of Quantum Circuit Simulation for Solving Max-Cut Problems with QAOA
Yu-Cheng Lin, Chuan-Chi Wang, Chia-Heng Tu +1 more·Dec 5, 2023
Quantum approximate optimization algorithm (QAOA) is one of the popular quantum algorithms that are used to solve combinatorial optimization problems via approximations. QAOA is able to be evaluated on both physical and virtual quantum computers simu...